Antenna



FIG. 1 is a top left front perspective view of an antenna showing our new design;

FIG. 2 is a bottom right back perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The dashed broken lines illustrate portions of the antenna and form no part of the claimed design. 

CLAIM We claim the ornamental design for an antenna, as shown and described. 